[Amps] Yaesu Orange Button

[Alek Petkovic]

You were lucky Jim.

My club was using my MKV in a contest, running around 15 Watts in the 
Class A position, to drive an amplifier. It lasted about 1 hour before 
the finals were cooked.

73, Alek.
VK6APK

On 25/05/2015 7:40 AM, Jim Forsyth wrote:
> It's orange on mine. I ran it for several years in class A, less than 
> full power, into a 6m transverter. I was very active and never had a 
> problem with it.
>
> Jim, AF6O
>
>
>
> On 5/24/2015 3:51 PM, Alek Petkovic wrote:
>> On the FT-1000MP MKV, the button is not orange and power is 
>> internally limited to 75 Watts.
>>
>> However, as Charly said, you must NEVER use less than 75 Watts, as 
>> the MKV cooling system is p1ss poor and the finals WILL burn up. I 
>> found out the hard way and thankfully, I was able to source some 
>> "real" replacements and the radio was able to be repaired. I think 
>> they are BLF147 or something like that.
>>
>> Anyway, take care, cos they are very hard to find. You can get the 
>> re-badged Chinese reconditioned version easily but genuine ones are 
>> very hard to find.
>>
>> 73, Alek. VK6APK
>>
>> On 24/05/2015 11:06 PM, Roger (K8RI) wrote:
>>> The "Orange button" is the Class A switch, but it should not be run 
>>> at more than 75 Watts. It just switches the bias.
>>>
>>> 73
>>>
>>> Roger  (K8RI)
>>>
>>> On 5/24/2015 10:44 AM, greg greene wrote:
>>>> " What about the Yaesu transceivers with the ORANGE button (some 
>>>> call it
>>>> red)?  Any Yaesu owner has stepped up to the plate and said he just 
>>>> uses
>>>> his orange button on (ALWAYS at full power, max RF power knob fully
>>>> clockwise).... and explains and extolls that strategy to put out 
>>>> cleaner
>>>> signals???"
>>>>
>>>> What is this 'orange' button of which you speak?
>>>>
>>>> Greg
>>>> VE7GPG
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>>>>
>>>
>>>
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>
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-- 
 From Sunny Binningup


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